Give way for weft-replenishing mechanism



Patented Mar. 27, 1928.

I 1,663,951 UNITED STA'I'ESV PATENT OFFICE. I

OSCAR V. PAYNE AND RICHARD GREENLEAFTURNER, OF WORCESTER, MASSACHU-- TO GROMPTON & KNOWLES LOOM WORKS, 0F WORCESTER, MAS- SETTS, ASSIGNORS SACI-IUSETTS, A CORPORATION 0F MASS AcH'UsETTs.

GIVE WAY FOR WEFT-REPLENISHING MECHANISM.

Application led November 15, 1926. Serial No. 148,401.

This invention relates to improvements in giveways or yielding supports for weft replenishing mechanisms more particularly of the multi-color type, and it is the principal object of the invention to simplify these devices to the end that a single resilient device may be made to operate with a pair of supports.

In multi-color wett replenishing mechanisms the bobbins are usually arranged in vertical stacks according to Ydistinctive characteristics, suoli as size, color, etc. and cradles release the lowermost bobbin of the stack corresponding to the depleted shuttle, so that the bobbins may move to a common transfer position immediately over the shuttle when the lay is in itsy extreme forward position. A hobbin released by its cradle is guided down the inclined surfaces of yielding supports. It is found that mechanisms ot' this `.type operate more satisfactorily when the front giveway yields under a comparatively high resistance and the rear giveway under a comparatively loW resistance. For al great many years the front support was made as an integral part of ythe magazine to insure proper movement of the bob- Vbin intov the shuttle, but in recent years the front giveway for the butt of the bobbin has ybeen made yielding under rather high pressure. The reason for this change in construct-ion was brought about by occasional' breakages resulting when a bobbin moving from one of the front cells or stacks wasV caught under the ktransferrer and pushed downwardly against the integral support. It is an important object ofV our present invention to provide a pair of bob-vv bin supports or giveways which are held together by a single resilient device applied to the giveways at diierent distances from their pivots lso that the front support yields under relatively high pressure and the rear 'support under relatively 'light pressure. In this respect our invention aims to provide a. construction similar in purpose to that shown in co-pending application Ser. No. 739,692 filed by Hume and King.v

lWith these and other objects in view which will appear as the description proceeds, our'invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein We have shown a convenient embodiment of our invention,

Fig. lis a side elevation of a portion of a multi-color weft replenishing mechanism Fig. 3 is a vertical section on,Y line 3-3 of'k Us the' loom sideV 10 has mounted thereon tlliei'oot 11 of a Fig. 1. I

Referring to the drawin multi-color replenishing mechanism 12 formed with a plurality of spaced flanges y 13 dening vertical compartments, 'orcells 14 in which the bobbins are located as they;

await transfer. A plurality of vertical slides 15, one for each stack, are provided and are controlled as to, their vertical position by a color slide 16 movable longitudinally in timed relation with` the box motion at the opposite side of the loom/and moved angularly to lift the slide corresponding to the active shuttle at the time of indication of weft exhaustion and to .depressthe slidel when theshuttle giving the indication is about to return under lthe magazine. The mechanism for. imparting this angular movement may include a lever 17 pivoted. at, 18 to the magazine 12 and'having a horizontal arm 19 connected to the color slide by means of a vertical link 20.4 The depend' ing arm 21 of the lever has an inclined fori wardly yand upwardl extending surface 22 which vcooperates wit nan indicating plunger of the type set forth in Patent No. 1,372,316 to Ryon.` The other Vfeatures ofk the mecha-A nism thus Jfar describedmay alsobe .as set forth in Patent No. 1,030,748. The transferrer arm 23 may be pivoted .on a fixed studv 24 and .may be as setforth in said patent when the lever 17 is employed or it may be of the usual form when'the magazine is made accordi-ngto said Patent No. 1,030,748.

In carrying our improvements into eiiect we provide the frame 12 with a pair of studs` 30 and 31Y located, respectively, in

rontof and behind the center of the magazine. Stud 30 affords pivotal mounting for support or giveway 32 kwhile support or giveway 33 is mounted on stud 31. Each of said supports may be formed as shown more particiilarly in Fig. 3 and extends downwardly as at 34 and under the lower portion of the frame 12. Each support has preferably integral therewith an inclined bobbin guide 35 lying on the inside magazine, as shown in Fig. 3.

Support or giveway 32 is normally in di- Y rect Contact with the lower surface 36 of the magazine, but support 33 is provided with an adjustable stop screw 37 which bears normally against surface 38 of the frame. By means of screw 37 the distance between adjacent lower ends of the guides 35 may be controlled.

In order that said supports may be held together yieldingly we provide a tension spring 39 having the left endsecured as at 40 to the support 33 and having the right end connected to the support 32 as at 4l, as viewed in Fig. 1. The left end of the spring is closer to stud 31 than the right end is to stud 30. The purpose of this arrangement is to cause greater resistance to the forward yielding of support 32 than is offered to the rearward yielding of supportV 33.

In operation when transfer' is about to take place the lowermost bobbin iii the stack or compartment corresponding to the shuttle to be replenished will be released and the butt of said bobbin will be guided down one orYthe-other of the inclined guides 35 and assume the position indicated at B in Fig. 1. The transferrer arm 23 will then be brought down by mechanism depending upon the type of magazine, and the bobbin will be moved between said supports, the rear sup# port 33 moving slightly to permit the butt of the bobbin to pass, and the Vsupport 32 remaining stationary because of the greater pressure exerted thereon by the spring, said forward support guiding the bobbin Vinto the shuttle. If for any reason the bobbin should be caught between the transferrer arm andv a guide 35, the latter will yield to avoid breakage. Y

While we have shown our giveways or supports in connection with a magazine having a transferrer which receives a downward movement Von every alternate pick of the loom, yet we do not wish to be limited to this construction, as the supports will operate with equal effectiveness irrespective of the manner in which the transferrer arm is depressed or indication of weft exhaustion is given to the magazine.

From the foregoing it will be seen that we v have provided a single resilient device for holding a pair of yielding bobbin supports in normal position and it will further be seen that by having this resilient device connected to the supports at different distances from their pivots, different degrees of resistance to yielding are offered by the supports. h

Having thus described our invention it will be apparent that changes and modificain normal position and resisting movementl of each support away from `normalbobbin supporting position, eachv support being yieldable and the deformation of the devicey being dependent upon the diameter Vof the butt of the'bobbiii and` independent of the Y- relative amounts each support moves.

Y2. In a weft replenishing mechanism, Aa movable support for the front ofthe butt 'of the bobbin, another movable support for theV rear of the'butt of the bobbin, means to Vhold the supports apart a distance less than the diameter of thebutt of the bobbin, and a single yielding device interposed between and connected to said supports to hold the samel in normal'bobbin holding position and offering resistance to the motion of each of said` supports relatively to vthe mechanism, cach support being yieldable'and the defer# ,mation vof theA device being dependent upon the `diameter of the butt of the bobbin and independent of the relative amounts each support moves. n

3. In a weft replenishing mechanism, a pair of substantially similar bobbin supports each movable relatively to the replenishing mechanism and each having any inclined guide, means to hold the supports apart a distance less than the diameter of the butt of thebobbin, said guides cooperating to support the butt of a bobbin in` transfer position, and a single resilient device 'con` nected to said supports to holdV the same yieldingly in normal position and resisting eter of the butt of the bobbin andindepend-k imi ent of the relative amounts each support Y moves. v A

4. In a weft replenishing mechanism, a pair of bobbin supports each pivotallyV connected to the replenishing mechanism at a point above a bobbin when in transfer'position, a bobbin guide for each support, the Y vguides serving to hold the butt of a bobbin in transfer position, means to holdthe guides apart a distance less than the diameter of the buttof the bobbin, and a resilient device located between said supports to hold the saine yieldingly in normal position and resisting movement of each support relatively to the replenishing mechanism, each support being yieldable and the deformation of the device being dependent upon the diameter of the butt of the bobbin and independent of the relative amounts each support moves.

5. In a Weft replenishing mechanism, a pair of bobbin supportseach pivotally connected to the replenishing mechanism at a point above a bobbin When in transfer position, a bobbin guide for each support, the guides serving to hold the butt ofv a bobbin in transfer position, meansto hold the guides apart a distance less than the diameter of the butt of the bobbin, and a single-resilient device located between said supports to hold the same yieldingly in normal position andl resisting movement of each support relatively to the replenishing mechanism, said resilient device comprising a tension spring attached to the supports at points below the pivots thereof, each support being yieldable and the deformation of the device being dependent upon the diameter of the butt of the bobbin and independent of the relative amounts each support'moves.

6. In a weft replenishing mechanism, a pair of supports for a bobbin in transfer position, and a single yielding device connected to said supports to hold the same yieldingly in normal position and exerting unequal pressures on said supports to cause one of said 'supports to offer greater resistance to moving relative to the mechanism than is offered by the other support.

7. In a weft replenishing mechanism, a pair of supports to hold the butt of a bobbin -each pivotally mounted on' the mechanism,

and a single resilient device connected to the supports to hold the same ieldingly in normal position,the distance etween thev pivot of one support and the point of attachment of the resilient ydevice to said support being greater than the distance between the pivot of the other support and the point of attachment ofthe resilient device thereto.

9. In a Weft replenishing mechanism, a pair of bobbin supports, pivots therefor carried by the replenishing mechanism and in substantial alignment,and a single resilient device connecting the tvvo supports together to hold the same yieldingly in normal position and resisting relative movement of each support with respect to the mechanism, said resilient device being disposed obliquely With respect to a horizontal line.

In testimony whereof rWe have hereunto allixed our signatures.

OSCAR V. PAYNE. RICHARD GREENLEAF TURNER. 

